package com.gongyi.reflection;

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

//动态的创建对象，通过反射
public class Test09 {
    public static void main(String[] args) throws ClassNotFoundException, NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException, NoSuchFieldException {
        //获得Class对象
        Class c1 = Class.forName("com.gongyi.reflection.User");

        //构造一个对象
        //User user = (User) c1.newInstance();
        //System.out.println(user);

        //通过构造器创建对象
       /* Constructor constructor = c1.getDeclaredConstructor(String.class, int.class, int.class);
        User user2 = (User) constructor.newInstance("工一", 001, 18);
        System.out.println(user2);*/

        //通过反射调用普通方法
        User user3 = (User) c1.newInstance();
        //通过反射获取一个方法
        Method setName = c1.getDeclaredMethod("setName", String.class);

        //invoke:激活的意思
        //(对象,"方法的值")
        setName.invoke(user3, "工一");
        System.out.println(user3.getName());

        //通过反射操作属性
        System.out.println("88888888888888888");
        User user4 = (User) c1.newInstance();
        Field name = c1.getDeclaredField("name");

        //不能直接操作私有属性，我们需要关闭程序的安全监测，属性或者方法的setAccessible(true);
        name.setAccessible(true);
        name.set(user4, "工一1");
        System.out.println(user4.getName());


    }
}
